Deaf person here. Those resources are great to learn from. However they lack the interpersonal aspects. It is similar to using Duolingo, you learn it from the app but it does not do enough to help you to retain the language. Our syntax, language, grammar are structured differently than what you are used to with your spoken languages.<p>If you want to be effective signing user[0], you are encouraged to interact with our community. You get a better exposure of our language through social activities and it will help you to retain your memory of our language.<p>Another resource I recommend is taking sign language classes in community colleges, they are cheap to attend and satisfied your foreign language requirements (if you are undergraduate). You get interactivity from your classmate and teacher, so you get a better benefits to retain our language than relying on those app alone.<p>Don't be scared of learning sign languages, they can be overwhelming. But it will worth it in the end. One advantage of sign languages my hearing[1] friend told me about that they can eat and sign at the same time without speaking, they don't have to worry about spitting out the foods while they are speaking.<p>[0] Someone who regularly uses sign languages<p>[1] Jargon term for a person do not have deafness.